Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/60979
Title: Loading-rate-independent delay of catastrophic avalanches in a bulk metallic glass
Authors: Chen, SH
Chan, KC 
Wang, G
Wu, FF
Xia, L
Ren, JL
Li, J
Dahmen, KA
Liaw, PK
Issue Date: 2016
Publisher: Nature Publishing Group
Source: Scientific reports, 2016, v. 6, 21967 How to cite?
Journal: Scientific reports 
Abstract: The plastic flow of bulk metallic glasses (BMGs) is characterized by intermittent bursts of avalanches, and this trend results in disastrous failures of BMGs. In the present work, a double-side-notched BMG specimen is designed, which exhibits chaotic plastic flows consisting of several catastrophic avalanches under the applied loading. The disastrous shear avalanches have, then, been delayed by forming a stable plastic-flow stage in the specimens with tailored distances between the bottoms of the notches, where the distribution of a complex stress field is acquired. Differing from the conventional compressive testing results, such a delaying process is independent of loading rate. The statistical analysis shows that in the specimens with delayed catastrophic failures, the plastic flow can evolve to a critical dynamics, making the catastrophic failure more predictable than the ones with chaotic plastic flows. The findings are of significance in understanding the plastic-flow mechanisms in BMGs and controlling the avalanches in relating solids.
URI: http://hdl.handle.net/10397/60979
EISSN: 2045-2322
DOI: 10.1038/srep21967
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